http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52415
--- Comment #2 from Jay Foad <jay.foad at gmail dot com> 2012-02-28 11:51:00 UTC --- > On the tree level nothing guarantees that 'p' is properly aligned. This is a digression, but what about C99 (Committee Draft -- April 12, 2011) 6.3.2.3p7: "A pointer to an object type may be converted to a pointer to a different object type. If the resulting pointer is not correctly aligned for the referenced type, the behavior is undefined." Doesn't that guarantee that p is properly aligned? If not, how can I assert that p *is* properly aligned, so the compiler can turn the memcpy into an aligned load? Thanks.
